sql,string,search,select , Sql string search


Sql string search

Question:

Tag: sql,string,search,select

This is my question:

Find the capital and the name where the capital includes the name of the country.

This is my answer:

SELECT name,capital
FROM world WHERE 
capital=concat(name,"NULL")

I dont understand what should i do in the "WHERE" part.

Should i do capital=concat(name,something?) or IN or LIKE?

Can you help me please? Thank you.

The question is from this link: http://sqlzoo.net/wiki/SELECT_names Question 13


Answer:

Not sure what you're trying to do with the NULL there, but basically you if you want to find a capital that contains the name of the country, the usage of the like operator is definitely in order. Just slap a couple of wildcards (%) around it, and you should be good to go:

SELECT name, capital
FROM   world
WHERE  capital LIKE CONCAT('%', name, '%')

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